Column roll out support

ABSTRACT

Two laterally and directionally adjustable supports for shoring and rolling out a formwork intact for reuse in successively pouring concrete floor slabs in a multi-story building. Lateral adjustment includes extension brackets having bases mounted on structural columns each carrying a horizontal angle arm that defines a vertical weight-bearing flange and a lateral horizontal clamping flange. Horizontally adjustable support brackets rest on the vertical flanges and have clamping means engaging the clamping flanges to hold tubular support means erect against the vertical flanges in weight-bearing relation. The support brackets telescopically receive screw assemblies through their tubular means for adjustment from below as supported by a nut nonrotatably resting on the tubular means. Each screw assembly includes a roller roll out fixture and a flanged guide shoe fixture telescoping with the roller as supported by an intermediate collar vertically controlled by a winged nut on the screws.

United States Patent Mocny et a1.

Filed:

COLUMN ROLL OUT SUPPORT Inventors: Richard C. Mocny; Francis B.

Mueller, both of Downers Grove, Ill.

Assignee: Waco Scaffold & Shoring C0.,

Schiller Park, 111.

June 5, 1974 Appl. No.: 476,406

Related U.S. Application Data [63] Continuation-in-part of Ser. No.322,969, Jan. 12,

1973, Pat. No. 3,815,858.

[52] U.S. Cl. 248/287; 249/219 R [51] Int. Cl. A47F 5/10; A47l-l 33/00;E046 17/16 [58] Field of Search 248/295, 287, 285, 286, 248/288; 249/219R, 18, 20; 254/133 R [56] References Cited UNITED STATES PATENTS2,456,878 12/1948 Krupha et a1. 254/133 R 3,204,933 9/1965 Brence254/133 R 3,504,879 4/1970 Strickland. 249/219 R X 3,771.753 11/1973Wilbur 248/295 3,776,499 12/1973 Turner.... 249/219 R X 3,779,50012/1973 Cox 249/219 R X 3,797,793 3/1974 Moritz et a1. 248/295 3,797,7943/1974 Lane 248/295 6/1974 Mocny 249/219 R X 7/1974 Warren 248/287Primary Exa'miner.l. Franklin Foss Attorney, Agent, or F irml-larbaughand Thomas [5 7 ABSTRACT Two laterally and directionally adjustablesupports for shoring and rolling out a formwork intact for reuse insuccessively pouring concrete floor slabs in a multistory building.Lateral adjustment includes extension brackets having bases mounted onstructural columns each carrying a horizontal angle arm that defines avertical weight-bearing flange and a lateral horizontal clamping flange.Horizontally adjustable support brackets rest on the vertical flangesand have clamping means engaging the clamping flanges to hold tubularsupport means erect against the vertical flanges in weight-bearingrelation. The support brackets telescopically receive screw assembliesthrough their tubular means for adjustment from below as supported by anut non-rotatably resting on the tubular means. Each screw assemblyincludes a roller roll out fixture and a flanged guide shoe fixturetelescoping with the roller as supported by an intermediate collarvertically controlled by a winged nut on the screws.

ll Claims, 5 Drawing Figures 1 COLUMN ROLL OUT SUPPORT CROSS REFERENCES:

This application is continuation in part of our Application Ser. No.322,969 filed 1/12/73, now US. Pat. No. 3,815,858.

BACKGROUND OF THE INVENTION:

Heretofore, concrete workform roll-out rollers have been rigidlysupported on elements that are spaced laterally a substantial distancefrom the centerline of support brackets in order to be cleared by thesupport head of the screw jack when it lowers the formwork for roll-out.Furthermore, not all brackets and rollers are at the same level on thestructural columns nor are the rollers necessarily in alignment forroll-out. Also, not all distances between the column and a form beamengaged by the roller are the same. Generally, substantial space isprovided between the adjacent workforms that are located on the oppositesides of a column, which space is occupied by narrow secondary forms.These forms drop out or are removed when at least one of the adjacentmain forms is lowered sufficiently for roll-out. This generallyincreases or leaves substantial lateral clearances between the mainforms and structural columns in which uncontrolled form beams duringroll-out can weave, scar the column, and upon occasion laterally rolloff of the roll-out rollers. This generally causes a binding of theforms and incurs delay and extra work and also leads to damage to theforms and materially decreases their longevity if they are knockdownforms for reuse at other building sites.

SUMMARY OF THE INVENTION:

In the present invention, not only is adequate clearance providedbetween structural columns and formwork for free roll-out, but provisionis also made on laterally adjustable beam support shoes for guides todirect the form beams on the rollers, and protect them againstderailment. This affords as much column clearance as will be required,or desired, merely by positioning the roll-out rollers and the flangedshoes laterally towards or away from the columns, or both, to align boththe shoe and guide for uniform, rectilineal roller support, bothlaterally and vertically, and the same for the rollers and guides for afree undistorted form rollout. Not only does this prevent roll-offswhere the clearances are desired but also increases the ease of roll-outand longevity of forms for repeated use with beams supported againstspreading or being cramped, particularly where steel beams areaccurately spaced and squared as disclosed in the co-preparedapplication of Ratcliff, et al, Ser. No. 478,698, filed June 12, 1974.

Although reusable formwork support brackets mounted on the structuralcolumns of a building under construction have been provided that areadjustable as to height for levelling the form and then lowering theformwork for roll-out and reuse, in the present invention theyindividually are universally adjustable independently, even to angulardirection with respect to the vertical plane of the supporting bracket,and collectively are adjustable with respect to their alignment and thespacing of the guides for holding the forms in line and securely inorientation on the roll-out rollers. Accordingly, even with somediscrepancy in the base mounting which may not be exactly square totheir alignment, the rollers will be brought square to the line ofroll-out with little tendency for the forms to roll off of the rollerseven where substantial roll-out clearances are providedv Furthermore,once the beams are located on the roll-out brackets, their guidedrelation is maintained regardless of the height of adjustment of shoe orroller.

In the present invention the opposing supports include simplified easilyhandled extension brackets each having a base plate which may bereleasably secured to a column within wide tolerances and a horizontalL- beam section or bar end-welded thereteo to provide arms approximatelyextending towards each other in pairs when mounted in place on buildingcolumns. A variation of :1 5 horizontally and four inches vertically aretolerable. Vertically oriented tubular support brackets are slidablyreceived on the arms as clamped thereto in a spaced relationpredetermined by the spacing of the roll-out beams of a formwork. Thetubular supports closely but freely receive externally threaded membersof screw assemblies in an axial telescoping erect relationship. Two nutsare carried by each screw. The lower nut non-rotatable engages thesupport in weight-bearing relation for vertical adjustments by rotatingthe screw from its lower end. The upper nut is a winged nut which couldinclude carrying an antifriction spacer above it.

The upper end of the screw swivelly supports a roller fixture directlyand also a load bearing shoe fixture which non-rotatively telescopestherewith and rests on the collar spacer supported by the winged nutwhereby adjustment of the winged nut determines whether the weight ofthe formwork is borne for rollout or held by the shoes in a fixedposition. The relative position of the roller and the shoe remainunchanged when they are moved vertically as a unit by screw rotation.Thus, the shoe can be initially lowered for the roller to be levelled tosupport the beams of the form without distortion when deposited thereon.The shoes are then raised a predetermined distance therefrom to take theform load when thewinged nuts are advanced a predetermined number ofrevolutions. Thereby, the roller and shoe fixtures jointly haveuniversal directional orientation as well as a'separate relativevertical adjustment with respect to each other. A workman merelyfinalizes the major adjustment with an extension wrench from below withsubstantial savings of time and effort.

Other and further objects and advantages will become apparent from thedescription and drawings which follow including the ease of fabricationof the embodiment shown; simplicity of operation and servicing; andminimized effort to adjust relative position of parts with minimumfriction.

IN THE DRAWINGS FIG. 1 is a perspective view from below showing apreferred embodiment of the invention operating to support formwork fora poured concrete floor slab above with the shoe fixture with its guideplate away from the column;

FIG. 2 is a perspective view of the support shown in FIG. 1 taken fromabove without the formwork in place and with the shoe fixture in itspreferred working position with its guide plate next to the column;

FIG. 3 is a vertical sectional view of the assembly of the tubularsupport bracket means shown in FIG. 1;

FIG. 4 is an end elevational view of the assembly shown in FIG. 1 takenpartly in section; and

FIG. 5 is a partly sectional view showing parts of the embodiment inFIG. 1 as taken on line 5-5 in FIG. I.

THE PREFERRED EMBODIMENT:

Referring in further detail to the drawings, a concrete structuralcolumn 10, of a building that is being built of poured concrete, isshown in FIG. 1 supporting formwork 12 upon which concrete is poured toform the slab 14 of the next floor above. After hardening, anotherseries of structural columns will be formed above as extensions of thelower ones and the formwork as illustrated can be lowered a substantialdistance, rolled out intact in a horizontal direction from below, andthen, as a flying form, rigidly relocated on supports 27 fastened toextensions of the columns for reuse in forming the next slab 14, etc.

Preferably, the frame of the formwork includes longitudinally disposedparallel I-beams l6'with slings I8 that support cross joists which inturn support plywood form panels 22 as more particluarly described insaid Ratcliff, et aI, application. The column 10 is one of many arrangedin pairs that are spaced and aligned in parallel rows in a repetitivepattern with each having spaced securement bolts 23 through them withwide tolerances to clamp the base members 26 of the support 27 in place,particularly if the columns are rounded in shape.

Although the support 27 can be made up of steel castings without needfor welding, it is illustrated as made in two parts one of which is theextension bracket 28 and the other a support bracket 38. The extensionbracket 28 includes a base 26 which has end-welded thereto a length ofan angle iron 30 with a deep flange portion 32 thereof disposedvertically for weightbearing purposes and a narrow flange portion 34disposed horizontally to serve as the stationary part of a clamp 36(FIG. 2) which adjustably receives a support bracket 38 at any selectedposition along the flange 32. A stop 35 is welded at the free end of theangle iron 30 to prevent unintentional disassociation of the assembly.

The support bracket 38 is a screw lift 40 which is mounted foradjustment along the flange 32 and includes a T-shaped body portion 42of two plates 44 and 46 (FIG. 3) welded together at a right angle as at48 with welded spaced right triangular braces 50 interbracing them. Theupright plate 44 rests against the vertical flange 32 and receives onits outer surface the tubular member 50 of the screw lift 40 as offsetwelded thereto at 51 to provide maximum extension of the screw lift 40and terminates below the upper end thereof as held structurally in placeby suitable squaring braces 52.

Beyond the edge of the horizontal flange 34 the horizontal plate 46 isapertured at 53 to receive bolts 54 therethrough. A pivotal clampingelement 54 similarly apertured at 55 inside a fulcrum member 56 weldedthereto serves as a jaw 58 for clamping the bracket 38 any place alongthe bar merely by tightening nuts 57 on the bolts 54 to draw the clampelement 58 against the bottom face of the horizontal flange 34. The nutsare accessible from below for actuation by a socket power wrench forindividual spot adjustn'ients.

The screw jack assembly 60, including a coarse threaded screw 62, can beslipped into place in the tubular member 50 either before or after theextension bracket 28 has been positioned and carries two nuts 64 and 66above the tubular members 50. Preferably the screw 62 is a sleeve morethan twice the length of the tube 50 and is provided at its lower endwith a wrenching member 68. It can be machined or formed square, or acast member can be used, but is illustrated as a hex head nut 68 weldedthereto at 70 for engagement by a crank or power wrench (not shown) forrotating it. The opening (not shown) through the nut 68 drains theinterior of the screw 62 to avoid dangers of water collection and freezeups.

The upper end of the screw 62 removably supports a shoe fixture 72 and aroller fixture 74 rotatively which telescope with each other on thescrew. For this purpose the screw 62 internally removes the verticalspindle 76 of the roller fixture 74 that has a yoke 78 secured theretowhose arms 80 carry an axle 81 that journals the roller 82. The bight ofthe yoke 78 rests rotatively on the flattened upper end 83 of the screw.

The shoe fixture 72 is load bearing and has a collar 84 loosely receivedexternally on the upper end of the screw 62 as rotatively and adjustablysupported in axial telescoping relationship by the winged nut 64threaded on the screw adjacent to its upper end. The collar 84 carries ayoke 78 telescoping laterally over the roller fixture 74 and terminatingin diverging flat arms 86 that define a flat head 87 to engage the beam16 of the formwork 12. The edges of the yoke 78 are reinforced bycontour cut plates 88 welded thereto and define a well 89 into which theroller fixture can non-rotatively telescope to a level below the head87. Upon at least one side a cut plate 88 extends above the highestadjustment point of the roller 82 to provide a flange 88A restinglaterally against the base flange 17 (FIG. 1) of the formwork beam 16.The flange receives the formwork beam 16 for geometric alignment oncethey overlap in height, and the beam in turn through the flange 88Athereby nonrotatively supports the shoe fixture 72 and the rollerfixture 74 against rotation relative to the support bracket 38. Thisnon-rotative engagement of the flange 88A with the beam also preventsswivel rotation of both the shoe fixture 72 and the roller fixture 82 ontop of the screw regardless of which one is actually in contact with thebeam 16. The relative support adjustment between the shoe 72 and roller82 is not disturbed when bodily raising and lowering the two fixtures asa unit as when turning the screw 62 in the cam nut 66 for gross or fineadjustment levels.

Thus, the roller and shoe fixtures are rotatable on top of the screw 62and respond to universal directional orientation in a horizontal planeto square-engage a formwork beam when oriented. Adjustment of the wingednut 64 on the screw 62 raises or lowers one fixture with respect to theother without relative rotation between them and the screw 62 bodilyraises and lowers them as a unit in their adjusted relation by beingrotated in the non-rotative nut 66. Accordingly, the roller 82 is freelyorientable to accommodate the direction of endwise movement of the beam,and also to be readily repaired if damage is incurred. Either the rolleror head, or both. can be removed and replaced by merely lifting eitheror both members from the upper end of the screw sleeve.

As noted, the tubular member 50 is shorter than the plate 44 preferablyat both ends by a distance approximately the height of the nut 66 andthe space between the plate 44 and the exterior surface of the screw 62is less than the major diameter of the hex wrenching contour nut 68.Thereby, when the screw jack assembly is lowered into place on the topof the tubular member 50, any minor diameter flat portion of the hexcontour of the nut 68 will be disposed next to the plate 44 (FIG. 4) andwill be thereby held against rotation when the nut 68 is inweight-bearing relation on the tube 50.

The load of the formwork beam 16 is carried by the nut 68 from the screw62 regardless of which fixture is the highest. If the roller 82 is thehighest the load is transmitted directly from the roller fixture 74 tothe upper end 83 of the screw. If the shoe fixture is the highest, theload is transmitted by the head 87 through the collar 84 and the wingednut 64 to the screw 62.

With the present invention the relative installation heights of therespective fixtures 28 are not critically significantregardingvariations in heights between respective sets of mounting bolts24' since the roller and head assembly units can be levelled easilythroughout the building area bya crank or power wrench (not shown)engaging the hex headed lower ends 68 of the screws 62 and adjusted, ifneed be, to transit sightings.

During installation the preassembled formwork is preferably loweredintact onto levelled roller fixtures with the flanges 88A preferablylocated remote from the columns. Thereby, the fixtures 72 and 74 aredisposed properly under and in alignment with the beam 16 and the formscan be rolled into place in tight engagement with one another.Thereupon, the formwork beams 16 can then be raised by the shoe fixtures72 to their final height by operation of the winged nuts 64 ready forpouring.

After the concrete slab 14 is poured and hardens sufficiently, thescrews 62 are progressively retracted downwardly as turned frombelow'until the formwork 12 drops free of the slab. and, is low enoughto roll out. There'upon. the winged nuts 64 are retracted to expose theroller fixtures 74 to contact with the formwork beams and with the guideflanges 88A engaging the sides of the beams, the rollers are heldoriented in the roll-out direction for the rollout.'

What is claimed is: v

1. In a device of the class described for shoring and rolling outformwork intact having spaced parallel beams for reuse in pouringconcrete floor slabs, the combination of two support means laterally anddirectionally adjustable on adjacent sides of spaced structural columnscomprising:

lateral adjustment extension means having opposing bases mounted on thestructural columns and carrying horizontal arms defining vertical weightbearing flanges extending approximately towards each other,

shoring bracket means resting against said vertical flanges to form oneside ofa clamping member and adjustably movable towards and away fromeach other on said arms and including second clamping members forholding them in a predetermined spaced relation related to said parallelbeams vertically disposed tubular elements spaced the same distance assaid beams,

screw lift means including screws supported in said tubular elements andincluding nut means threaded thereon for raising and lowering saidscrews when the screws are rotated.

roller fixture means swivelly supported with respect to and on the upperend of the screws carrying hor izontally disposed rollers to engage saidparallel beamsin roll-out relationship, guide flange means disposedsquare to said rollers and swivelly carried by 'said screw to engagesaid beams in laterally and longitudinally ruiding relationship forconfining the rollers square to a predetermined roll-out path for theformwork. 2. The combination called for in claim 1 in which saidelongated element comprises an angle arm that defines a. vertical weightbearing flange and said fixtures are supported directly in line aboveit. r

3. The combination called for in claim 1 including a winged nut on saidscrew lift means and means intermediate said nut and said fixture meansincluding aspacer sleeve. I i

4. An adjustable support for shoring and rolling out a workform intactfor reuse in pouring concrete floor slabs comprising:

an extension bracket having; a base portion to engage a structuralcolumn in supported relation and an elongated element extendinghorizontally therefrom;

a unitary support bracket slidable mounted adjust ably upon said elementand having a vertically disposed tubular member in supported closeproximity to the element and receiving a nut means in supportednon-rotatable relation;

screw lift means including a screw telescopicallyreceived and rotatablein said tubular element and supported by said nut means;

roller fixture means swivelled about a vertical axis at the upper end ofthe screw to engage a beam of a reusable formwork in rolling relation;

shoe fixture means supported swivelly on the upper end of the screw inrelative non-rotatable relation with said roller fixture means tocontact the beam in supporting relation;

means for adjusting said fixtures vertically relative to each other forselective engagement with said beam; and

guide flange means disposed square to said roller carriedby one of saidfixtures means to square said roller and beam in laterally andlongitudinally guiding relationship.

5. The device defined in claim 4 in which said adjusting means isa'winged nut carried by screw intermediate adjusting means and said shoefixture means.

6. The device-defined in claim 4 in which said support bracket and saidelongated element have vertical walls in face-to-face contact with eachother; and

clamp means securing said walls in relative horizontally adjustedrelation.

7. The device defined in claim 6 in which said vertical wall carries aclamping means engaging a horizontal wall on said horizontally extendingelongated element having a stop means at its free end.

8. The device defined in claim 4 in which said fixtures are disposedapproximately the same height at a rela tive point intermediate theirrelative vertical movement.

9. An adjustable support for shoring and rolling out a formwork intactfor reuse in successive pouring of concrete floor slabs comprising:

an extension bracket having a base portion securable to a structuralcolumn and carrying a horizontal extension am having a weight carryingvertical flange;

a support bracket having a vertically oriented tubular element andresting in weight supported relation on said extension arm inhorizontally adjustable relation;

screw lift means rotatably received in said tubular element for closevertical alignment as its lower end and including first nut means onsaid screw lift means supported non-rotatively on said support bracket,

a roller fixture swivelly supported upon the upper end of the screw liftmeans,

a shoe fixture supported swivelly on said upper end below said rollerfixture, said fixtures telescoping in relative non-rotativerelationship,

second nut means on said screw lift means below said shoe fixture foradjusting said fixtures vertically relative to each other for selectiveengagement with said workform, and

means squaring said roller fixture to said formwork in laterally andlongitudinally determined relationship.

10. In a device of the class described for shoring and rolling outformwork intact having spaced parallel beams for reuse in pouringconcrete floor slabs, the combination of two support means laterally anddirectionally adjustable towards and away from each other and supportedon adjacent sides of spaced structural columns, said support meanscomprising:

lateral adjustment extension means having opposing bases mounted on thestructural columns and carrying horizontal arms defining verticalweightbearing flanges extending approximately towards each other,

shoring bracket means having lateral flanges resting on said armscarrying bodies with vertically disposed tubular elements restingagainst said vertical flanges to form one side of a clamping member andadjustably movable towards and away from each other on said arms andincluding second clamping members on the other side of said lateralflanges for holding them in a predetermined spaced relation related tosaid parallel beams with the vertically disposed tubular elements spacedthe same distance as said beams,

screw lift means including screws slipped into said tubular elements andincluding nut means threaded thereon for raising and lowering saidscrews in supported relation when the screws are rotated,

roller fixture means supported and coaxially swivelled on the upper endof the screws and carrying determined roll-out path for the formwork. lI. An adjustable support for shoring and rolling out a formwork intactin pouring concrete floor slabs com- 10 prising:

an extension bracket having a base portion to engage a structural columnin supported relation and an elongated element extended horizontallytherefrom defining walls disposed at right angles to one another, one ofwhich has a stop means at its free end,

a support bracket slidably mounted adjustably upon said element andhaving a vertically disposed tubular member, said element having a wallin face-toface contact with one of said walls to define a pair ofvertically disposed walls and another wall in face-to-face contact withthe other of said walls to define a pair of horizontally disposed walls,said vertical pair of walls erectly supporting a vertically disposedtubular member in supported close proximity to said element andreceiving a nut means in supported non-rotatable relation,

clamp means carried by one wall of one of the pairs of walls includingan element clamping against the other wall of said one of the pairs ofwalls to secure them in relative horizontally adjusted relation,

screw lift means including a screw telescopically received and rotatablein said tubular element and supported by said nut means,

roller fixture means supported swivelly about a vertical axis on theupper end of the screw to engage a beam of a reusable formwork inrolling relation,

shoe fixture means supported swivelly on the upper end of the screw inrelative non-rotatable relation with said roller fixture means tocontact the beam in supporting relation,

means for adjusting said fixture means vertically relative to each otherfor selective engagement with said beam, and

guide flange means disposed square to said roller carried by one of saidfixture means to square said roller and beam in laterally andlongitudinally guiding relationship.

1. In a device of the class described for shoring and rolling outformwork intact having spaced parallel beams for reuse in pouringconcrete floor slabs, the combination of two support means laterally anddirectionally adjustable on adjacent sides of spaced structural columnscomprising: lateral adjustment extension means having opposing basesmounted on the structural columns and carrying horizontal arms definingvertical weight-bearing flanges extending approximately towards eachother, shoring bracket means resting against said vertical flanges toform one side of a clamping member and adjustably movable towards andaway from each other on said arms and including second clamping membersfor holding them in a predetermined spaced relation related to saidparallel beams vertically disposed tubular elements spaced the samedistance as said beams, screw lift means including screws supported insaid tubular elements and including nut means threaded thereon forraising and lowering said screws when the screws are rotated, rollerfixture means swivelly supported with respect to and on the upper end ofthe screws carrying horizontally disposed rollers to engage saidparallel beams in roll-out relationship, guide flange means disposedsquare to said rollers and swivelly carried by said screw to engage saidbeams in laterally and longitudinally ruiding relationship for confiningthe rollers square to a predetermined roll-out path for the formwork. 2.The combination called for in claim 1 in which said elongated elementcomprises an angle arm that defines a vertical weight-bearing flange andsaid fixtures are supported directly in line above it.
 3. Thecombination called for in claim 1 including a winged nut on said screwlift means and means intermediate said nut and said fixture meansincluding a spacer sleeve.
 4. An adjustable support for shoring androlling out a workform intact for reuse in pouring concrete floor slabscomprising: an extension bracket having a base portion to engage astructural column in supported relation and an elongated elementextending horizontally therefrom; a unitary support bracket slidablemounted adjustably upon said element and having a vertically disposedtubular member in supported close proximity to the element and receivinga nut means in supported non-rotatable relation; SCREW lift meansincluding a screw telescopically received and rotatable in said tubularelement and supported by said nut means; roller fixture means swivelledabout a vertical axis at the upper end of the screw to engage a beam ofa reusable formwork in rolling relation; shoe fixture means supportedswivelly on the upper end of the screw in relative non-rotatablerelation with said roller fixture means to contact the beam insupporting relation; means for adjusting said fixtures verticallyrelative to each other for selective engagement with said beam; andguide flange means disposed square to said roller carried by one of saidfixtures means to square said roller and beam in laterally andlongitudinally guiding relationship.
 5. The device defined in claim 4 inwhich said adjusting means is a winged nut carried by screw intermediateadjusting means and said shoe fixture means.
 6. The device defined inclaim 4 in which said support bracket and said elongated element havevertical walls in face-to-face contact with each other; and clamp meanssecuring said walls in relative horizontally adjusted relation.
 7. Thedevice defined in claim 6 in which said vertical wall carries a clampingmeans engaging a horizontal wall on said horizontally extendingelongated element having a stop means at its free end.
 8. The devicedefined in claim 4 in which said fixtures are disposed approximately thesame height at a relative point intermediate their relative verticalmovement.
 9. An adjustable support for shoring and rolling out aformwork intact for reuse in successive pouring of concrete floor slabscomprising: an extension bracket having a base portion securable to astructural column and carrying a horizontal extension arm having aweight carrying vertical flange; a support bracket having a verticallyoriented tubular element and resting in weight supported relation onsaid extension arm in horizontally adjustable relation; screw lift meansrotatably received in said tubular element for close vertical alignmentas its lower end and including first nut means on said screw lift meanssupported non-rotatively on said support bracket, a roller fixtureswivelly supported upon the upper end of the screw lift means, a shoefixture supported swivelly on said upper end below said roller fixture,said fixtures telescoping in relative non-rotative relationship, secondnut means on said screw lift means below said shoe fixture for adjustingsaid fixtures vertically relative to each other for selective engagementwith said workform, and means squaring said roller fixture to saidformwork in laterally and longitudinally determined relationship.
 10. Ina device of the class described for shoring and rolling out formworkintact having spaced parallel beams for reuse in pouring concrete floorslabs, the combination of two support means laterally and directionallyadjustable towards and away from each other and supported on adjacentsides of spaced structural columns, said support means comprising:lateral adjustment extension means having opposing bases mounted on thestructural columns and carrying horizontal arms defining verticalweight-bearing flanges extending approximately towards each other,shoring bracket means having lateral flanges resting on said armscarrying bodies with vertically disposed tubular elements restingagainst said vertical flanges to form one side of a clamping member andadjustably movable towards and away from each other on said arms andincluding second clamping members on the other side of said lateralflanges for holding them in a predetermined spaced relation related tosaid parallel beams with the vertically disposed tubular elements spacedthe same distance as said beams, screw lift means including screwsslipped into said tubular elements and including nut means threadedthereon for raising and lowering said screws in supported relation whenthe screws are rotatEd, roller fixture means supported and coaxiallyswivelled on the upper end of the screws and carrying horizontallydisposed rollers to engage said parallel beams in roll-out relationship,and guide flange means disposed square to said rollers and carried bysaid screw to engage said beams in laterally and longitudinally guidingrelationship for confining the rollers square to said beams in apredetermined roll-out path for the formwork.
 11. An adjustable supportfor shoring and rolling out a formwork intact in pouring concrete floorslabs comprising: an extension bracket having a base portion to engage astructural column in supported relation and an elongated elementextended horizontally therefrom defining walls disposed at right anglesto one another, one of which has a stop means at its free end, a supportbracket slidably mounted adjustably upon said element and having avertically disposed tubular member, said element having a wall inface-to-face contact with one of said walls to define a pair ofvertically disposed walls and another wall in face-to-face contact withthe other of said walls to define a pair of horizontally disposed walls,said vertical pair of walls erectly supporting a vertically disposedtubular member in supported close proximity to said element andreceiving a nut means in supported non-rotatable relation, clamp meanscarried by one wall of one of the pairs of walls including an elementclamping against the other wall of said one of the pairs of walls tosecure them in relative horizontally adjusted relation, screw lift meansincluding a screw telescopically received and rotatable in said tubularelement and supported by said nut means, roller fixture means supportedswivelly about a vertical axis on the upper end of the screw to engage abeam of a reusable formwork in rolling relation, shoe fixture meanssupported swivelly on the upper end of the screw in relativenon-rotatable relation with said roller fixture means to contact thebeam in supporting relation, means for adjusting said fixture meansvertically relative to each other for selective engagement with saidbeam, and guide flange means disposed square to said roller carried byone of said fixture means to square said roller and beam in laterallyand longitudinally guiding relationship.